JPS6137844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closed power distribution board in which unit chambers are formed in multiple stages in an outer box, and more particularly to a closed power distribution board with improved shelf boards and disconnection mounting plates for the unit chambers.

Conventionally, closed switchboards have been constructed in a multi-tiered type, in which unit chambers are arranged in multiple tiers within an outer box, and each of these unit chambers stores a unit main body equipped with electrical equipment such as a shield or disconnector in such a way that it can be taken in and out. There is something like that. Figure 1 shows the entirety of such a multi-tiered closed switchboard. 1 is an outer box, 2 is a unit room formed in multiple stages inside the outer box 1, and 3 is a unit room formed adjacent to this unit room 2. This is the wiring processing room. As shown in FIG. 2, each of the unit chambers 2 is partitioned by shelf boards attached to a frame 4 constituting the outer box 1. Further, a disconnecting section mounting plate 6 is attached between the unit chamber 2 and the wiring processing chamber 3, and a load-side fixed disconnecting section receptacle 9 is attached to this disconnecting section attaching plate 6. Furthermore, a busbar chamber (not shown) is formed at the rear of the unit chamber 2, and a vertical busbar 7 is supported by a vertical busbar cover 8 and disposed within this busbar chamber. On the other hand, FIG. 3 shows the unit main body 11, which is provided with electrical equipment such as a wiring cable and a disconnector 13 inside a case 12. As shown in FIG. Further, a plug 15 for a movable load-side disconnecting section that can be connected to and separated from the receptacle 9 is attached to the side plate 14 on the right side of the case 12, and a power-supply side disconnecting section 17 (shown in FIG. 4) is attached to the back plate. ) is provided.

When such a unit main body 11 is stored in the unit chamber 2, the vertical busbar 7 and the power supply side disconnecting section 17 are connected as shown in FIG. 4, and the receptacle 9 for the fixed disconnecting section and the movable disconnecting section are connected. The plug 15 is connected.

However, in the closed switchboard with the above configuration, the second
As shown in the figure, the disconnector mounting plate 6 is provided for each unit chamber 2, so if the size of the unit main body 11 changes due to a change in load capacity, the disconnector mounting plate 6 must also be changed. Unfortunately, it was necessary to prepare various sizes. Furthermore, when installing the disconnection section mounting plate 6, highly accurate dimensional adjustment is required for each unit in order to maintain a constant fitting dimension between the receptacle 9 and the plug 15 described above.

In addition, the shelf board 5 is attached to the frame 4 constituting the outer box 1 with tightening screws 18, 19, and 20, and is also attached to the disconnection section mounting plate 6 with tightening screws 21, so that the screws can be tightened in this way. In this support structure, when there is an emergency change in the unit chamber due to a change in the load capacity of the unit main body 11, a large amount of man-hours are required for tightening the screws for removing and reinstalling the disconnection part mounting plate 6 as well. There were disadvantages such as the need to readjust the shelf board 5 and the disconnection section mounting plate 6 each time the tightening was performed.

An object of the present invention is to use a single plate having a length that reaches from the top to the bottom inside the outer box and common to each unit room as the disconnection part mounting plate, and to improve the mounting structure of the shelf board. To provide a closed power distribution board that reduces assembly and adjustment work and facilitates modification work by changing unit rooms.

The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 5 shows the unit chamber 23 which is the main subject of the present invention. In the figure, reference numeral 24 denotes a shelf board, and each side of the quadrilateral is bent downward in the figure to form a flange portion 24a, and the rear edge has protrusions 25 for engagement on both left and right sides. , 26 are formed. Flange portion 24 located on the left side in the illustration
A is provided with a mounting hole 27 to the frame 33,
A mounting hole 28 for connecting to the disconnection section mounting plate 29 is provided in the flange section 24a located on the right side. A disconnection section mounting plate 29 is provided on the side of the unit chamber 23, and this disconnection section mounting plate 29 is formed by bending the side edge on the front side at a substantially right angle toward the left side.
a, and a mounting plate portion 29b whose rear side edge is bent at a substantially right angle to the right side, contrary to the mounting plate 29a, and its vertical length is As shown in FIG. 7, it has a length that is approximately equal to the sum of the height dimensions of each unit chamber and a length that is commonly located on the side of each unit chamber. In addition, the width dimension in the front and back direction is as shown in Figure 6.
It has a length up to approximately the center of the front-rear width dimension. Attachment holes 30 for attaching receptacles 38 serving as fixed disconnectors are provided at a constant pitch along the height direction in the attaching plate section 29a located on the front side of the disconnector attaching plate 29. Further, the mounting plate portions 29b on the rear surface side are provided at intervals in the height direction, and each mounting plate portion 29b is provided with a mounting hole 31 for mounting on the frame side. Further, the flat plate portion 29c in contact with the shelf board 24 is provided with a tightening hole 32 for coupling with the shelf board 24. On the other hand, the frame 33 has a shelf board 24 on the left side in the figure.
A mounting hole 34 is provided for mounting the
Also, in the mounting plates 33a, 33a for mounting the busbar cover 8 located at the rear of the shelf board 24, there are mounting holes 37 for mounting the disconnection part mounting plate 29 on the right side of the figure.
However, mounting holes 35 and 36 are provided on both sides, respectively, to fit into the protrusions 25 and 26 of the shelf board 24 and support the shelf board 24.

FIG. 6 shows a state in which the frame 33, shelf board 24, disconnection section mounting plate 29, and receptacle 38 are assembled. The disconnection part mounting plate 29 is secured by tightening the mounting screws 39 together using the mounting holes 31 of the mounting plate 29b shown in FIG. 5 and the mounting holes 37 provided in the mounting plate 33a of the frame 33. is connected to the frame 33 side for vertical positioning,
Further, by tightening the mounting hole 32 and the mounting hole 28 provided in the shelf board 24 together with a tightening screw 40, it is connected to the shelf board 24 and positioned in the left-right direction. Furthermore, by inserting the protrusions 25 and 26 on the rear edge into the respective mounting holes 35 and 36 formed in the mounting plate 33a of the frame 33, vertical and horizontal positioning is achieved, and the left side surface is inserted into the mounting hole 27. By tightening the screws 41 using the mounting holes 34 of the frame 33, vertical and longitudinal positioning is achieved. In this way, the shelf board 24 is supported so as to be able to withstand forces in any direction: left and right, up and down, and front and back. In addition, by connecting the disconnection section mounting plate 29 and the right side surface of the shelf board 24, it is possible to position the disconnection section mounting plate 29 in the left-right direction and prevent the shelf board 24 from bending in the vertical direction. and is being reinforced.

Note that the mounting plate 33 is the one in which the mounting plate part 29b of the disconnection part mounting plate 29 is bent to the left side in the figure, and the left protrusion 25 of the shelf board 24 is placed closer to the right side than the side edge.
This is to prevent it from becoming a hindrance when attaching other members to a, 33a, and it is not necessarily necessary to configure it in this way.

When attaching the receptacle 38 to the disconnection section mounting plate 29, since the mounting holes 30 of the disconnection section mounting plate 29 are formed with the same fixed pitch as the mounting hole pitch formed in the receptacle 38, the receptacle 38 can be mounted on the unit. It can be installed in any position depending on the position of the main body.

In this way, the length of the disconnection section mounting plate 29 is set to be the total length of the unit chambers 23 configured in the frame 33, and the disconnection section is configured in common from the uppermost unit chamber to the lowermost unit chamber. At the same time, it is possible to eliminate the work of adjusting the installation of the mounting plate, and at the same time, the number of parts can be reduced. In addition, since the rear edge of each shelf board 24 is configured to be attached by inserting it into the mounting plate 33a of the frame 33 using the protrusions 25 and 26, the number of tightening screws can be reduced, and it is possible to change the arrangement of the unit body. Adaptability is also improved.

FIG. 7 shows a case in which the unit chambers 23 are provided in all stages with shelf boards 24 within the frame 33. In such a case, the length of the disconnection part mounting plate 29 may be set from the ceiling board to the floor board.

FIG. 8 shows the case where the terminal chamber 40 is provided in the lower part of the frame 33, and FIG. 9 shows the case where the terminal chamber 40 is provided in the upper part. In such a case, the length of the disconnection section mounting plate 39 is made equal to the number of unit chambers 23. In this case, since the mounting holes for the frame 33 in the disconnection mounting plate 29 are vertically symmetrically drilled, a common mounting plate can be used regardless of whether the terminal chamber is arranged above or below, and it is possible to simply shift the mounting position. It can be treated.

As explained above, according to the present invention, the rear edge of the shelf board is made into an insert type, and the length of the disconnection part mounting plate is made equal to the sum of the height dimensions of each unit room, thereby making it possible to assemble and adjust the unit room. Work can be reduced and changes in unit rooms can be easily accommodated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a general multi-tiered closed switchboard, FIG. 2 is a perspective view showing a conventional unit chamber, and FIG. 3 is a perspective view showing a conventional unit main body.
FIG. 4 is a plan view of the unit main body housed in a conventional unit chamber, FIG. 5 is an exploded perspective view showing an embodiment of the unit chamber which is the main part of the closed switchboard of the present invention, and FIG. FIG. 5 is a plan sectional view showing the assembled state of the unit chamber, and FIGS. 7 to 9 each show different embodiments of the disconnection section mounting plate of the present invention, and FIG. FIGS. 8 and 9 are front views showing a case in which a disconnecting part mounting plate is provided in the closed power distribution board having the structure, and FIGS. 8 and 9 are front views showing a case in which a disconnecting part mounting plate is provided in the closed power distribution board having a terminal chamber. 24...shelf board, 24a...flange part, 25,
26...Protrusion, 27, 28, 31, 32, 34,
37...Mounting hole, 29...Disconnection part mounting plate, 33...
...Frame, 35, 36...Mounting holes into which the protrusions fit.

Claims (1)

[Claims] 1 The inside of the frame constituting the outer box is partitioned by a plurality of shelf boards to form a multi-stage unit chamber, and a busbar chamber equipped with a busbar cover that supports the vertical busbar is provided at the rear of this unit chamber, and the unit chamber A wire room common to each unit room is provided on the side of the
In the unit chamber, a unit main body equipped with electrical equipment is stored in and out of the unit, and the shelf board has protrusions formed on both sides of the rear edge, and mounting holes formed on the opposite side of the frame. and one side is connected to the side surface of the frame with a tightening screw, and a length approximately equal to the sum of the height dimensions of each unit room is provided between each unit room and the wire room. A disconnecting section mounting plate having mounting holes for attaching the fixed disconnecting section at a constant pitch along the height direction is provided, and this disconnecting section mounting plate is connected to the frame and the shelf board with tightening screws. A closed switchboard characterized by: